Peters



' T. V. ALLIS. Device for Cutting Barbs on Pence Material.

No. 232,870. Patented Oct. 5,1880.

fl 2. Y I W unu ml ljd|lumll|h m'lull 11m Hi1 m I )h "h a In NW M11 WWW W W Ill ldivrrnn TATES ATENT Orrin THOMAS V. ALLTS, OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 232,870, dated October 5, 1880. Application filed September 30, 1879.

To all whom it may concern Be it known that I, THOMAS V. ALLIs, of New York, in the county and State of New York, have invented new and useful Improve ments in Mechanism for Forming Barbs on Fence-Rods, which is fully described in the following specification.

The barbed fencing which is the subject of treatment by the improved barb-forming mechanism hereinafter described is made by first rolling long shapes or rods composed of a body .or core with one or two thin fins projecting radially from one or two sides, and then cutting away portions of the fins between certain points which are left at suitable distances apart for the barbs, the same being sharppointed like saw-teeeth, with both sides of like angles to the rod, but being much more distant from each other, and the notches between them being much wider than the barbs, and parallel, or nearly so, at the bottom with the rod.

It is the mechanism for cutting away the surplus metal of these fins and shaping the points or barbs that is the subjectof this pat cut; and the essential features are, first, a contrivance of the punch and die to make the desired triangular and sharp-pointed form of barbs by cutting away portions of the fins between the barbs and along the rod or core, the construction being such as not to cut away all of the metal of the fins close up to and along the core between the bases of the barbs, but to leave a narrow strip or web of the same, in connection with the core or body of the rod, for preserving greater strength thereto between the barbs than if out close to the core, and also for enabling the die to have greater breadth and body of metal along the side of the groove in its face in which the core lies while the fins are out, to prevent the metal from breaking and chipping off by the blows of the punches; and, second, a peculiar contrivance in the arrangement of several punches and dies in a gang to expedite the work, the same being governed by or due to the form of the punches and dies and the necessity of cutting the opposite sides of the barbs by different punches and in difierent operations, to avoid the use of dies having fine angular and therefore weak points, which would be necessary if arranged in a gang in the order of the barbs and the spaces between them.

Figure 1 is a side elevation of a gang of punches and a die with a section of the fencing-rod or shape being punched or cut. Fig.

2 is a plan of two gangs of punches arranged for making barbs on opposite sides of the rod which has two fins. Fig. 3 is a plan of the compound die corresponding to the above gangs of punches, with dotted lines showing the red as in the progress of work. Fig. 4: is

a plan of the partly cut or punched red, as indicated by the dotted lines in Fig. 3.

A, Fig. 4, represents the rod or shape of fencing, on which the barbs B are to be formed out of the fins G by punching out the metal from the spaces D between the points to be left for the barbs, the said rod or shape having, in this case, two fins, for the purpose of arming it with two lines of barbs.

E represents the punches in Figs. 1 and 2, of which there are three in a row or gang for each side of the rod.

The punches of each row are located as wide 7 5 apartas the distance from outside to outside of two barbs-that is to say, the distance across two barbs and a space, D, between them.

F and G, Fig. 3, represent the faces of the compound bed-die, wherein the recesses D are the cavities in which the punches work to cut away the spaces in the fins between the barbs.

The dotted lines in the righthand portion of Fig. 3 represent the rod having the barbs on it completed. At the left hand of the same figure the rod is represented by dotted and full lines, with the spaces first out in the formation of the barbs.

The faces F between the recesses D correo spond in length to the spaces between the punches-that is, they are equal in length to the distance from outside to outside of two barbs, and they correspondin form to the shape of the metal remaining when alternate spaces 5 D are cut away, except they are a little wider than the rod or shape and its fins.

The faces G are equal in length to the distance from inside to inside between two barbs at their base, and they are as wide outside of Ice the groove 9 in the center of the die made for the core or body of the rod as it is desired that the narrow portion 75 of the fins shall be, which are to be retained for greater strength of the rod between the barbs than it would have if the fins were cut close. Another object of these faces G is to preserve a body of metal in the die itself sufiicient to protect it from chipping off, as it would if narrowed to the breadth of the core or body of the rod, or thereabout, in which case the thin edges each side of the groove would not have strength to resist the shocks of the punches. This groove 9 is for the core or body A to bed in while the fins lie on the faces F G.

The distance between the punches of the two rows or gangs is made to correspond with the breadth of two faces, Gr, plus the groove 9, being the same breadth that the body .A, with the retained narrow strips 1', is to be after the spaces D are cut out.

The fins, it will be observed by reference to the dotted lines a a, Fig. 4, are a little wider than the length of the barbs, and by reference to the dotted lines I), Fig. 3, which represent the finishing cut made in cutting out the surplus metal, it will be seen that the breadth of the punches and their distance apart are so adjusted with reference to each other and to the breadth of the fins that these last cuts shear across the oblique edges 6, made by the first cuts inside of the outer edges, f, of the fins, and thus insure sharp points to the barbs, which would not always be had if the punches and die were adjusted to cut points as long as the breadth of the fins, because of the inaccuracy of the feeding apparatus, which would cause some to be made too blunt, while others would be cut away too short and small.

Fig. 3 represents the faces of the compound bed-die and also the spaces cut in the fins, those in the full lines being by, say, the last operation of the punches, while the dotted lines at the right hand represent spaces cut by a previous operation of the punches. This figure shows by the breadth of the faces F, with which the punches correspond,and which is greater than that of the fins, also by their length and the distances apart of the punchrecesscs D, and also by the proportionate length of said recesses to the lengthof faces F, the arrangement to shear the cuts by which the lines of the beveled edges of the barbs are made to cross each other inside of edges f of the fins to insure the sharp points.

It is manifest that two punches, E, cannot be placed close enough together to cutboth sides of a barb while the rod or shape lies in the one position without having the bed-die reduced to a sharp point corresponding to the shape of the barbs, which point would be quickly destroyed by wearing and breaking off, and besides it would not afford support for any breadth of fin greater than the length of the barb to facilitate the shearing of sharp points. However, it is desirable to use more than one punch and die in a line or gang to increase the capacity of the machine. But if it be tried to use two sets arranged for cutting out alternate spacesthat is, located sufficiently distant to skip one space and two barbsboth sets would not be operative together, for the second set would act in the space cut by the first set and the blanks between the two sets would go uncut if the rod were fed twice the distance at one operation that it would be fed with one set. But by arranging three punches and their corresponding die-recesses in line and the same distance apart, as above stated, and theufeeding the rod the length of three spaces, D, at each operation, the barbs will be cut first on one side and then on the other without any sharp points in the die, as above described, and at the same time the cuts will be sheared across the points, as stated, while the capacity of the machine will be three times greater than with one punch and die. In this arrangement the blank left between the first and second punches, counting from left to right, and supposing the rod to feed in the same direction, will rest, after feeding another move, under the third punch, so as to be cut out by it, while the spaceD cut out by the first punch will be between the second and third punches.

The same result will be obtained if five or any odd number of punches are used and the rod is fed a corresponding odd number of spaces D.

I do not claim, broadly, cutting sharp points by shearing the final cut across the edge of the barb made by the previous cut, for such operations are performed with machines for making glaziers points, patented as early as 1858, and it has also been a common practice for years in the making of saw-teeth.

What I claim is 1. The die for shaping barbs B out of fins C on rods A, having the rod-groove g along its face, a punch-recess, D, on one or both sides of groove g, and a face or faces, G, between recess or recesses D and groove g, substantially as described.

2. The combination of a punch, E, with a die having recess D, faces F G, and groove g, said punch and die being constructed and arranged to cut the adjacent sides of two barbs, B, and the web or fin i between said barbs and along the core by one operation, and also at the same time point one of said barbs by' shearing it thereat across the edge formed by a previous operation, substantially as described.

3. A gang of punches, E, and die-recesses D for said punches, arranged the distance apart of two adjacent barbs to be formed on the rod, and one space between said barbs, and having the die-faces F between: said dierecesses corresponding in length to said two barbs and one space, and the said gang consisting of three or any other odd number of punches and die-recesses, substantially as described.

Witnesses: THOMAS V. ALLIS.

W. J. ll/IORGAN, F. A. THAYER. 

